Kim Basinger: Stage mom!

By

Sid Lipsey

Updated 6:39 PM EST,

Tue December 17, 2013

What's the only thing cooler than watching your daughter make her film debut? Co-starring with your daughter in her film debut!

Kim Basinger got to play the role of stage mom when model Ireland Baldwin, Basinger's 18-year-old daughter with ex-husband Alec Baldwin, co-starred in Basinger's new movie, "Grudge Match” (which also stars Sylvester Stallone and Robert De Niro).

In the movie, Ireland plays a younger version of her mom's character in a flashback scene. But Ireland may want to flash back to when her mom talked to Showbiz Tonight -- so she could stop Basinger from spilling a big secret about Ireland's first day on the set.

"She was very, very nervous -- extremely nervous," Basinger reveals (you can almost hear an exasperated Ireland somewhere yelling, "MOM...!!!") But Basinger adds: "Once she got out there and she did her first scene, the second scene you would've thought she'd done 20 movies. So it was really cool."

Ireland may have nailed her movie debut, but what about the rest of her career? What advice has Basinger given young Ireland about navigating the tough world of celebrity? Watch Showbiz Tonight at 11 p.m. ET/PT on HLN.